/**

* Modify the search results on (Google.com) that happen to be

* from certain URLs.

* @param {Array} urls- a list of URLs to modify the results of

*/

function clearURLs(urls) {

const isBlacklistedUrl = (link) => urls.some(url => link.includes(url));

const decorateURL = (url) => `Wiper blacklisted URL: <a href="${url}">${url}</a>`;

Array.from(document.querySelectorAll('div.g'))

.filter(result => isBlacklistedUrl(result.querySelector('a').href))

.forEach(result => {result.innerHTML = decorateURL(result.querySelector('a').href)});

return true;

}

function handleBlacklistURLs(blacklist){

return clearURLs(blacklist.blacklistURLs);

}

function handleGoogleSearchResults(toggle){

if (toggle === true){

browser.runtime.sendMessage({'message': 'google.com-true'});

browser.storage.local.get('blacklistURLs')

.then(handleBlacklistURLs, reportError);

}

}

/**

* Log an error. This function might be updated in a future version

* remote error loggin.

* @param {String} err- the error

*/

function reportError(err) {

console.log(err);

}

/* global operations for every time the target page (./google./search) loads */

//document.body.style.border = "1px solid blue";

browser.storage.local.get('enabled')

.then(

(enabled) => {handleGoogleSearchResults(enabled.enabled)},

reportError);

/*

Add Listeners to changes in storage.

*/

function localStorageChangeHandler(changes) {

let changedItems = Object.keys(changes);

for (let item of changedItems){

if (item === 'enabled' && changes[item].newValue === true){

handleGoogleSearchResults(true);

}

else if (item === 'enabled' && changes[item].newValue != true){

handleGoogleSearchResults(false);

}

}

}

browser.storage.onChanged.addListener(localStorageChangeHandler);